Wow, thanks guys!
The pattern I made has been done in Illustrator, so I guess the vinyl sign route is an option. Do you know roughly how much that sort of thing costs?
I'm usually sending big orders through for production graphics (trade show type application) - so it's hard for me so say anything other than "reasonable"... But call a few shops and offer to email them the file for them to price, or tell them the size and they can give you a price per square foot. Make sure to tell them you'll apply it yourself, and generally I have a spare cut just in case I screw up applying the first set.
Another term to know is "weeding". Weeding removes all the negative image surrounding the positive image you want, including places like the "hole" of an "o" or "g". This is tedious work, and if you're willing to take it on yourself your job will cost A LOT less.
These places have people calling with small jobs all the time. You'll be easy since your file is already prep'ed to go - most people calling up out of the book can't understand why their GIF web logo cannot be cut. Try calling an Insta-Signs type place first, tell them you've got a small, straight forward project you'ld like them to look at.
Once you've got drawing shapes in Illustrator down, you're ready to move on to laser cutting railings and decking. Most metal fabricating shops and some sign shops have a water or laser jet cutter that can cut out 3D patterned shapes. Great for Sail Barge railings, Death Star patterns and Tantive IV panels.